4.19.1 string declarations

string s1="Now I know";
string s2="how to encode a \" in a string...";
string s=s1+" "+s2; // concatenation of 3 strings
s;
==> Now I know how to encode a " in a string...
s1,s2; // 2 strings, separated by a blank in the output:
==> Now I know how to encode a " in a string...